16)Ifx = cosec(tan-1(cos(cot-1 (sec(sin-1 a))))) and y =sec(cot- 1(sin(tan-1(cosec(cos-1a))) then x2 + y isequal to(1) 3- a2(3) 3 - 2a2(2) 6-2a2(4) 2a217. The total number of ordered pairs of (x, y)satisfying theequation 13 + 12\lbrack tan- x\rbrack-24\lbrack In x\rbrack+ 8\lbrack e\rbrack+ 6\lbrack cos-ylis/are(2) 1(4) Infinitely many(3) 2

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